Fort Eisenhower, Georgia

Fort Eisenhower (formerly Fort Gordon), is a 55,000-acre Army base, and home of the U.S. Army Signal Corps, which is responsible for installation, operation, and maintenance of the Army's communications systems. Also the site of the NSA's Security Operations Center, one of the NSA's principal operating locations outside its headquarters at Fort Meade, Maryland. The Center is said to have cost more than $1 billion, when it was constructed around 2012.